Telecom Regulatory Authority of India (Trai) today announced a 3-step process to implement the National Do Not Call (NDNC) Registry, which would check unsolicited calls after 45 days of registration with the telecom service provider.In the first phase of implementation, National Informatic Centre (NIC) has designed an online registration module for telemarketers. As of now, about 14,750 telemarketers, having around 4,50,000 telephone lines, have already applied with various telecom service providers for getting themselves registered with the Department of Telecom (DoT). The telecom service providers are in the process to verify these telemarketers.The registration of subscribers for NDNC would commence in the second phase. The registration is being done through their respective service providers, Trai said in a statement."Once a telephone number is registered, it will take about 45 days for this mechanism to come into effect," Trai said, adding NIC has prepared a scrubbing module and the authority is in a process of validating it in the third phase.Once the module is functional, the authority would ask all tele-marketers to get their calling list scrubbed through this module and telemarketers would be able to call only those numbers cleared by the NDNC Registry, it added.